WhoisJSON MCP Server: Install & Setup

Install WhoisJSON in Claude Code

Claude Code

claude mcp add whoisjson -e WHOISJSON_API_KEY=... -- npx -y @whoisjson/mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "whoisjson": {
      "command": "npx",
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ],
      "env": {
        "WHOISJSON_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the WhoisJSON MCP server do?

WHOIS, DNS, SSL, and domain availability lookups for AI assistants

Is the WhoisJSON MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does WhoisJSON run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add WhoisJSON to Claude Code?

Run: claude mcp add whoisjson -e WHOISJSON_API_KEY=... -- npx -y @whoisjson/mcp-server

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